#region (c) 2014 THN Solutions LLC. - All rights reserved
/*
Simplified BSD License (BSD)
Copyright (c) 2014, THN Solutions LLC. ( www.ThnSolutions.com )
Author: Nguyễn, M. Hải                 ( www.Minh-Hai.com     )
All rights reserved.

Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:

    * Redistributions of source code must retain the above copyright notice, this 
      list of conditions and the following disclaimer.

    * Redistributions in binary form must reproduce the above copyright notice, 
      this list of conditions and the following disclaimer in the documentation 
      and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 
BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
POSSIBILITY OF SUCH DAMAGE.
*/
#endregion

#region Record of Change
//             							CHANGE HISTORY
// -------------------------------------------------------------------------------------
// |   DATE    | DEVELOPER  | DESCRIPTION                                              |
// -------------------------------------------------------------------------------------
// | 12-Nov-09 | HaiNM      | First creation.                                          |
// -------------------------------------------------------------------------------------
//
#endregion

#region Record of Audit
//             							REVIEW HISTORY
// -------------------------------------------------------------------------------------
// |   DATE    | REVIEWER   | NOTES                                                    |
// -------------------------------------------------------------------------------------
// -------------------------------------------------------------------------------------
//
#endregion

#region Using directives
using System;

using Thn;
#endregion

namespace Thn.Interface.Vcl
{
    /// <summary>
    /// Default implementation of <see cref="IPageDescriptor"/>.
    /// </summary>
#if DEBUG
    public
#else
    public
#endif
 class PageDescriptor : IPageDescriptor
    {
        #region Create page
        /// <summary>
        /// Create a page instance
        /// </summary>
        protected virtual IPage CreatePage()
        {
            if (mPageType == null) throw new Exception("PageType has not been specified");

            object result = Activator.CreateInstance(mPageType);

            if (!(result is IPage)) throw new Exception("The specified PageType does not implement interface IPage");

            return (IPage)result;
        }
        #endregion

        #region IPageDescriptor Members

        #region ID
        private string mID;
        /// <summary>
        /// Gets/Sets identifier of page
        /// </summary>
        public string ID
        {
            get { return mID; }
            set { mID = value; }
        }
        #endregion

        #region PageType
        private Type mPageType;
        /// <summary>
        /// Gets/Sets the type of IPage control.
        /// </summary>
        public Type PageType
        {
            get { return mPageType; }
            set { mPageType = value; }
        }
        #endregion

        #region Page
        private IPage mPage;
        /// <summary>
        /// Gets the page object
        /// </summary>
        public IPage Page
        {
            get
            {
                //lazy initialize
                if (mPage == null)
                {
                    mPage = CreatePage();
                }

                return mPage;
            }
        }
        #endregion

        #region Name
        private string mName;
        /// <summary>
        /// Gets/Sets description of page
        /// </summary>
        public string Name
        {
            get { return mName; }
            set { mName = value; }
        }
        #endregion

        #region Parent
        private IPageDescriptor mParent;
        /// <summary>
        /// Gets/Sets the descriptor of parent page
        /// </summary>
        public IPageDescriptor Parent
        {
            get { return mParent; }
            set { mParent = value; }
        }
        #endregion

        #endregion

        #region To String
        public override string ToString()
        {
            return string.Format("Name: {0} ID: {1} Type: {2} Parent: {3}", mName, mID, mPageType, mParent);
        }
        #endregion

        #region Constructors
        /// <summary>
        /// Default constructor.
        /// </summary>
        public PageDescriptor()
        { }
        #endregion
    }
}
